Finder 50.16.9.012.5510 – 50 Series Relays with forcibly guided contacts

Why Choose the Finder 50.16.9.012.5510 Safety Relay?

The Finder 50.16.9.012.5510 is a six-pole electromechanical safety relay from the Finder 50 Series, designed for industrial safety-related control circuits requiring Type A forcibly guided contacts. Featuring a 12 V DC operating coil, five normally open contacts (5 NO) and one normally closed contact (1 NC), this relay combines multiple switching outputs with a mechanically linked feedback contact.

Designed in accordance with EN 61810-3 for forcibly guided contact operation, the Finder 50.16.9.012.5510 is suitable for integration into appropriately engineered safety monitoring systems, machinery controls and industrial automation equipment. Its 8 A rated contact current, 250 V AC rated contact voltage and silver tin oxide (AgSnO₂) contacts provide dependable switching for suitable electrical loads.

The relay features PCB through-hole mounting, a 5 mm terminal pitch and compact dimensions of 55 × 16.5 × 16.5 mm. Its RT III wash-tight construction, low-power DC coil and mechanically linked contact system make it a practical component for safety relay modules, industrial electronic assemblies and control equipment.

Key Advantages

• Type A forcibly guided contacts support contact-state monitoring in safety-related circuits.
• EN 61810-3 contact guidance provides a recognised basis for safety relay integration.
• Six-pole configuration combines multiple switching contacts in one compact component.
• Five normally open contacts provide multiple switched output circuits.
• One normally closed contact supports feedback and monitoring functions.
• 12 V DC operating coil suits compatible low-voltage control electronics.
• 8 A rated contact current for appropriately rated electrical loads.
• 15 A maximum contact current under specified peak conditions.
• Silver tin oxide contacts provide robust electromechanical switching characteristics.
• 0.8 W nominal coil consumption supports efficient control circuit design.
• PCB through-hole mounting simplifies integration into electronic assemblies.
• 5 mm terminal pitch supports practical PCB layout design.
• RT III wash-tight construction provides protection during suitable PCB manufacturing processes.
• Compact housing reduces space requirements in industrial electronics.

Key Features

• Finder 50 Series miniature safety relay.
• 50.16 six-pole electromechanical relay construction.
• Type A forcibly guided contact arrangement.
• Contact guidance in accordance with EN 61810-3.
• Five normally open contacts (5 NO).
• One normally closed contact (1 NC).
• Six mechanically linked contact circuits.
• 8 A rated contact current.
• 15 A maximum peak contact current.
• 250 V AC rated contact voltage.
• 400 V AC maximum switching voltage.
• 220 V DC maximum switching voltage.
• 2,000 VA resistive AC switching capacity.
• 8 A resistive DC switching rating at 24 V DC.
• 12 V DC nominal coil voltage.
• 180 Ω nominal coil resistance.
• Approximately 66.6 mA nominal coil current.
• 0.8 W nominal coil consumption.
• Silver tin oxide (AgSnO₂) contact material.
• Monostable, non-latching operation.
• PCB through-hole terminal arrangement.
• 5 mm terminal pitch.
• RT III wash-tight protection category.
• −40 to +70 °C operating temperature range.

Type A Forcibly Guided Contacts for Safety-Related Applications

The defining characteristic of the Finder 50.16.9.012.5510 is its Type A forcibly guided contact system. The five normally open contacts and one normally closed contact are mechanically linked to provide predictable contact relationships under the conditions defined by EN 61810-3.

In an appropriately designed monitoring circuit, the normally closed contact can provide feedback about the state of the relay's switching mechanism. If a normally open contact becomes welded closed, the forcibly guided arrangement prevents the associated normally closed contact from returning to its normal closed state, allowing suitable monitoring electronics to identify the fault.

The 5 NO + 1 NC arrangement is particularly useful where multiple switched outputs and one feedback contact are required within a single safety-related control assembly.

Safety design consideration: The relay is a component for integration into a safety system and does not independently establish a particular Safety Integrity Level (SIL) or Performance Level (PL). The complete safety function must be designed and validated according to the relevant application standards.

Reliable 12 V DC Electromechanical Switching

The Finder 50.16.9.012.5510 uses a 12 V DC electromagnetic coil to operate all six contacts. When the coil is energised, the five normally open contacts close and the normally closed contact opens. When the coil is de-energised, the contacts return to their normal positions, provided the relay is functioning correctly.

Its 180 Ω coil resistance corresponds to approximately 66.6 mA nominal current and 0.8 W power consumption. These characteristics allow the relay to be driven by a suitably rated DC control circuit.

The AgSnO₂ contact material is suited to electromechanical switching applications. With a rated resistive contact capacity of 8 A at 250 V AC and 8 A at 24 V DC, the relay provides flexible switching performance when operated within its specified electrical limits.

Compact PCB Integration and Wash-Tight Construction

The Finder 50.16.9.012.5510 is designed for direct PCB through-hole mounting. Its 5 mm terminal pitch and compact 55 × 16.5 × 16.5 mm housing make it suitable for safety monitoring boards, industrial electronic assemblies and multi-output control modules.

The RT III wash-tight construction supports integration into PCB manufacturing processes involving suitable cleaning operations. Its enclosed construction helps protect the relay's internal contact mechanism during specified assembly procedures.

For reliable performance, the final PCB design should account for contact loading, conductor sizing, coil drive requirements, electrical separation and the relevant safety architecture.

Typical Applications

• Safety relay modules and monitoring equipment.
• Emergency-stop monitoring circuits within validated safety systems.
• Industrial machinery safety control assemblies.
• Guard-door and safety interlock monitoring systems.
• Safety-related PLC interface electronics.
• Multi-output safety switching circuits.
• Contact-state feedback and fault detection systems.
• Industrial automation and control boards.
• Manufacturing machinery and production equipment.
• OEM safety-related electronic assemblies.
• PCB-based switching and monitoring equipment.
• Electrical control applications requiring forcibly guided contacts.